Shyness of the crown

I've seen this before but saving in hopes I remember this phenomenon. Gaps in the treetops curb the spread of insects, parasitic vines, or infectious disease and improve access to light. (Postnote: Likely saw this on Kottke years ago)

boredpanda.com

Looking up at trees from below where their canopy forms complex shapes but never touch

Peak Fall Foliage in Vermont’s Green Mountain National Forest

10 minutes of lovely autumn colors / via Twisted Sifter

youtu.be

Autumn leaves along a river